One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6,9,12)(7,11,8,10)(21,22)(23,29)(24,32)(25,26)(27,31)(28,34)(30,35)(33,36)(13,14,16,18)(15,19,20,17)(22,25)(27,29)(28,32)(35,36)(5,7,9,8)(6,10,12,11)(13,15,16,20)(14,17,18,19)(21,23)(22,27)(24,33)(25,29)(26,31)(28,36)(30,34)(32,35)(1,2,3,4)(5,6)(7,10)(8,11)(9,12)(21,24)(22,28)(23,30)(25,32)(26,34)(27,35)(29,36)(31,33)(5,8,9,7)(6,11,12,10)(21,25,26,22)(23,29,31,27)(24,32,34,28)(30,36,33,35)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.